Nissan Frontier D22. Manual — part 509
IGNITION SIGNAL
EC-1139
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
10.
CHECK IGNITION COIL
1.
Disconnect ignition coil harness connector.
2.
Check resistance as shown in the figure.
For checking secondary coil, remove distributor cap and mea-
sure resistance between coil tower metal tip 9 and terminal 7.
OK or NG
OK
>> GO TO 11.
NG
>> Replace distributor assembly.
11.
CHECK POWER TRANSISTOR
1.
Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness con-
nector.
2.
Check power transistor resistance between terminals 2 and 8.
OK or NG
OK
>> GO TO 12.
NG
>> Replace distributor assembly.
12.
CHECK INTERMITTENT INCIDENT
Refer to
EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
Removal and Installation
UBS00DQ7
DISTRIBUTOR
Refer to
EM-80, "OUTER COMPONENT PARTS"
.
Terminal
Resistance [at 20
°C
(68
°F)]
7 - 8 (Primary coil)
Approx. 1.0
Ω
7 - 9 (secondary coil)
Approx. 10 k
Ω
SEF013S
AEC657A
Terminals
Resistance
Result
2 and 8
Except 0
Ω
OK
0
Ω
NG
SEF015S
EC-1140
[VG33E]
INJECTOR CIRCUIT
INJECTOR CIRCUIT
PFP:16600
Component Description
UBS00DQ8
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.
CONSULT-II Reference Value in Data Monitor Mode
UBS00DQ9
Specification data are reference values.
SEF812J
MONITOR ITEM
CONDITION
SPECIFICATION
INJ PULSE-B1
INJ PULSE-B2
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: N (A/T), Neutral (M/T)
●
No load
Idle
2.4 - 3.7 msec
2,000 rpm
1.9 - 3.3 msec
B/FUEL SCHDL
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: N (A/T), Neutral (M/T)
●
No load
Idle
1.0 - 1.6 msec
2,000 rpm
0.7 - 1.4 msec
INJECTOR CIRCUIT
EC-1141
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
UBS00DQA
BBWA0497E
EC-1142
[VG33E]
INJECTOR CIRCUIT
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than the ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
UBS00DQB
1.
INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
102
104
106
109
111
113
W/B
W/R
W/G
W/L
W/PU
W
Injector No. 1
Injector No. 3
Injector No. 5
Injector No. 2
Injector No. 4
Injector No. 6
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
SEF007V
SEF008V
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